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R600/SI: Don't copy flags when extracting subreg
This was resulting in use of a register after a kill. For some reason this showed up as a problem in many tests when moving the SIFixSGPRCopies pass closer to instruction selection. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222175 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1281,13 +1281,15 @@ unsigned SIInstrInfo::buildExtractSubReg(MachineBasicBlock::iterator MI,
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// value so we don't need to worry about merging its subreg index with the
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// SubIdx passed to this function. The register coalescer should be able to
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// eliminate this extra copy.
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BuildMI(*MI->getParent(), MI, MI->getDebugLoc(), get(TargetOpcode::COPY),
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NewSuperReg)
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.addOperand(SuperReg);
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MachineBasicBlock *MBB = MI->getParent();
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DebugLoc DL = MI->getDebugLoc();
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BuildMI(*MBB, MI, DL, get(TargetOpcode::COPY), NewSuperReg)
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.addReg(SuperReg.getReg(), 0, SuperReg.getSubReg());
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BuildMI(*MBB, MI, DL, get(TargetOpcode::COPY), SubReg)
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.addReg(NewSuperReg, 0, SubIdx);
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BuildMI(*MI->getParent(), MI, MI->getDebugLoc(), get(TargetOpcode::COPY),
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SubReg)
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.addReg(NewSuperReg, 0, SubIdx);
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return SubReg;
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}
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